-
Notifications
You must be signed in to change notification settings - Fork 4
/
NETBIOS.cs
423 lines (396 loc) · 21.5 KB
/
NETBIOS.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace Reecon
{
class NETBIOS // TCP 139
{
public static (string, string) GetInfo(string target, int port)
{
string toReturn = "";
// Console.WriteLine("Running: GetNBStatInfo");
toReturn += GetNBStatInfo(target); // Uses UDP Port 137
// Console.WriteLine("Running: GetDNSHostEntry");
toReturn += GetDNSHostEntry(target);
// https://www.samba.org/samba/docs/current/man-html/rpcclient.1.html
// The standard (well-known) TCP port number for an SMB/CIFS server is 139, which is the default.
// Console.WriteLine("Running: GetRPCInfo");
toReturn += GetRPCInfo(target);
toReturn += $"- nmap -sC -sV may have some additional information for port {port}";
return ("NETBIOS", toReturn);
}
public static string GetNBStatInfo(string ip)
{
// This code is messy as heck and needs to be cleaned
// MAC was here, but got nuked
string toReturn = "";
byte[] bs = new byte[] { 0x0, 0x00, 0x0, 0x10, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x43, 0x4b, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x0, 0x0, 0x21, 0x0, 0x1 };
byte[] Buf = new byte[500];
string str = "", strHost = "", Host = "", Group = "", User = "", strHex = "";
int receive;
try
{
IPEndPoint senderTest = new(IPAddress.Any, 137);
EndPoint Remote = (EndPoint)senderTest;
IPEndPoint ipep = new(IPAddress.Parse(ip), 137);
Socket server = new(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
// server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout,);
server.SendTo(bs, bs.Length, SocketFlags.None, ipep);
server.ReceiveTimeout = 5000;
receive = server.ReceiveFrom(Buf, ref Remote);
server.Close();
string buffStr = ASCIIEncoding.ASCII.GetString(Buf);
int tem = 0, num = 0;
bool bAdd = true;
for (int i = 57; i < 500; i++) //57-72
{
//end
if (Buf[i] == 0xcc)
break;
if (Buf[i] == 0x20)
bAdd = false;
if (bAdd)
{
str = ((char)Buf[i]).ToString();
if (Buf[i] >= ' ') strHost += str;
str = ((char)Buf[i]).ToString();
strHex += str;
}
if ((++tem) % 18 == 0)
{
bAdd = true;
if (strHost == "")
{
num++;
break;
}
if (num == 0 && strHost != "")
{
Host = strHost;
toReturn += "- NETBIOS Name: " + Host + Environment.NewLine;
num++;
}
else
{
if (Host != strHost && num == 1 && strHost != "")
{
Group = strHost;
// This character is invisible and completely breaks layouts on Linux - And I have no idea why
Group = Group.Replace(Convert.ToChar(132).ToString(), "");
toReturn += "- Group: " + Group + Environment.NewLine;
num++;
}
else
{
if (strHost != Host && strHost != Group && num == 2 && strHost != "")
{
User = strHost;
if (User != "__MSBROWSE__")
{
toReturn += "- User: " + User + Environment.NewLine;
num++;
}
}
}
}
strHost = "";
strHex = "";
}
}
}
catch (SocketException ex)
{
// Windows // Mono
if (!ex.Message.StartsWith("A connection attempt failed because the connected party did not properly respond after a period of time") && ex.Message != "Connection timed out")
//Console.WriteLine(ex.Message);
{
return "Error: " + ex.Message;
}
}
return toReturn;
}
private static string GetDNSHostEntry(string ip)
{
string dnsInfo = "";
// TODO: https://dzone.com/articles/practical-fun-with-netbios-name-service-and-comput
try
{
IPHostEntry entry = Dns.GetHostEntry(ip);
if (entry != null)
{
if (!string.IsNullOrEmpty(entry.HostName))
{
dnsInfo = "- HostName: " + entry.HostName + Environment.NewLine;
}
else
{
dnsInfo = "- Unknown Path GetDNSHostEntry.emptyHostName - Bug Reelix";
}
}
else
{
dnsInfo = "- Unknown Path GetDNSHostEntry.nullEntry - Bug Reelix";
}
}
catch (Exception ex)
{
if (ex.Message != "Name or service not known")
{
dnsInfo += "- Unable to get DNS Host Entry: " + ex.Message + Environment.NewLine;
}
}
return dnsInfo;
}
private static string GetRPCInfo(string ip)
{
// Beware!
string rpcInfo = "";
bool anonAccess = false;
bool signing = true;
if (General.GetOS() == General.OS.Linux)
{
if (General.IsInstalledOnLinux("rpcclient", "/usr/bin/rpcclient"))
{
// Find the Domain Name
// Console.WriteLine("RPC - lsaquery");
List<string> domainNameList = RPCClient.GetLsaqueryOutput(ip);
domainNameList.RemoveAll(x => !x.StartsWith("Domain Name:"));
if (domainNameList.Count == 1)
{
anonAccess = true;
rpcInfo += "- " + domainNameList[0] + Environment.NewLine;
}
// Server info
// Console.WriteLine("RPC - srvinfo");
List<string> srvinfoList = RPCClient.GetSrvinfoOutput(ip);
bool setNoSigning = false;
// If it's denied the first time - Try the no-signing backup
if (srvinfoList.Count != 0 && srvinfoList[0].Contains("NT_STATUS_ACCESS_DENIED"))
{
// noSigning backup!
// Console.WriteLine("RPC - srvinfo - noSigning Backup");
srvinfoList = RPCClient.GetSrvinfoOutput(ip, false);
setNoSigning = true;
}
if (srvinfoList.Count != 0 && !srvinfoList.Any(x => x.Contains("NT_STATUS_ACCESS_DENIED")) && !srvinfoList[0].Contains("NT_STATUS_LOGON_FAILURE"))
{
// If it only worked with the no-signing backup - Yay!
if (setNoSigning)
{
Console.WriteLine("Sneaky access found with RPC - This might take a bit longer than planned (Up to 3 minutes)");
signing = false;
}
anonAccess = true;
/*
MOTUNUI Wk Sv PrQ Unx NT SNT motunui server (Samba, Ubuntu)
platform_id : 500
os version : 6.1
server type : 0x809a03
*/
rpcInfo += "- srvinfo: " + srvinfoList[0] + Environment.NewLine;
// https://en.wikipedia.org/wiki/List_of_Microsoft_Windows_versions
if (srvinfoList.Count == 4)
{
if (srvinfoList[2].Trim().StartsWith("os version"))
{
string osVersion = srvinfoList[2];
osVersion = osVersion.Split(':')[1];
osVersion = osVersion.Trim();
if (osVersion == "6.1")
{
rpcInfo += "- srvinfo (OS): Windows 7 OR Windows Server 2008 (One of the two)" + Environment.NewLine;
}
else if (osVersion == "6.2")
{
rpcInfo += "- srvinfo (OS): Windows 8 OR Windows Server 2012 (One of the two)" + Environment.NewLine;
}
else if (osVersion == "10.0")
{
rpcInfo += "- srvinfo (OS): Windows 10 OR Windows Server 2016 OR Windows Server 2019 (10.0 is very vague)" + Environment.NewLine;
}
else
{
rpcInfo += "- srvinfo (OS): Unknown - ID: " + osVersion + " - Bug Reelix!" + Environment.NewLine;
}
}
else
{
rpcInfo += "- Weird srvinfo return - Bug Reelix!";
}
}
}
// Console.WriteLine("RPC - enumdomusers");
List<string> enumdomusersList = RPCClient.GetEnumdomusersOutput(ip, signing);
if (enumdomusersList.Count == 0 // Allowed - But no results
|| enumdomusersList.Count == 1 && enumdomusersList[0].Contains("NT_STATUS_ACCESS_DENIED"))
{
// Find public SIDs with lsaenumsid
// Console.WriteLine("RPC - lsaenumid");
List<string> sidList = RPCClient.GetLsaenumsidOutput(ip, signing);
if (sidList.Count != 0 && !sidList[0].Contains("NT_STATUS_ACCESS_DENIED"))
{
anonAccess = true;
rpcInfo += "- Found SIDs" + Environment.NewLine;
List<string> sidResolution = RPCClient.GetLookupsidsOutput(ip, sidList, signing);
if (sidResolution.Count != 0)
{
foreach (string result in sidResolution)
{
rpcInfo += "-- " + result + Environment.NewLine;
}
}
}
// Find sneaky SIDs
// Console.WriteLine("RPC - lookupnames");
List<string> sneakyNameLookup = RPCClient.GetLookupnamesOutput(ip, "administrator guest krbtgt root bin none", signing);
sneakyNameLookup.RemoveAll(x => !x.Contains("(User: "));
if (sneakyNameLookup.Count != 0)
{
anonAccess = true;
List<string> sneakySIDBaseList = new();
foreach (string name in sneakyNameLookup)
{
string sneakySID = name.Split(' ')[1];
if (!sidList.Contains(sneakySID))
{
// Just add the base - We lookup later
string sneakySIDBase = sneakySID.Substring(0, sneakySID.LastIndexOf("-") + 1);
if (!sneakySIDBaseList.Contains(sneakySIDBase))
{
sneakySIDBaseList.Add(sneakySIDBase);
}
}
}
// Needs the base SID to enumerate
if (sneakySIDBaseList.Count != 0)
{
List<string> sneakySIDList = new();
foreach (string sneakyBase in sneakySIDBaseList)
{
// Low ones are just system names - Can ignore them - Proper ones start from 1000
for (int j = 1000; j <= 1015; j++)
{
sneakySIDList.Add(sneakyBase + j);
}
// Some sneakier ones hiding from 1100 instead
for (int j = 1100; j <= 1115; j++)
{
sneakySIDList.Add(sneakyBase + j);
}
List<string> sneakySIDLookup = RPCClient.GetLookupsidsOutput(ip, sneakySIDList, signing);
if (sneakySIDLookup.Count != 0)
{
// Remove non-users
sneakySIDLookup.RemoveAll(x => !x.Trim().EndsWith("(1)"));
foreach (string lookupResult in sneakySIDLookup)
{
string name = lookupResult.Substring(0, lookupResult.LastIndexOf(" (1)"));
name = name.Remove(0, name.LastIndexOf("\\") + 1);
// Some invalid ones simply have the number itself instead of the name
// A bit hacky, but it works
if (!int.TryParse(name, out int toIgnore))
{
rpcInfo += "-- " + $"Sneaky Username Found: {name}".Recolor(Color.Orange) + Environment.NewLine;
}
}
}
}
}
}
}
else // Count > 0
{
string firstItem = enumdomusersList[0];
if (firstItem.Contains("user:") && firstItem.Contains("rid:"))
{
// All is fine
if (enumdomusersList.Count >= 3)
{
Console.WriteLine("Found a lot of useful RPC info - Output may take a few seconds longer than expected");
}
rpcInfo += "- User Listing" + Environment.NewLine;
List<string> usernames = new List<string>();
foreach (string user in enumdomusersList)
{
// user:[fox] rid:[0x3e8]
string username = user.Remove(0, user.IndexOf("[") + 1);
username = username.Substring(0, username.IndexOf("]"));
usernames.Add(username);
rpcInfo += RPCClient.GetQueryuserInfo(ip, username);
}
// See if there are any we're missing
// Get the default names list
var defaultNames = RPCClient.LookupNames(ip, "administrator guest krbtgt root bin none", signing);
// Filter them to only get the users
defaultNames = defaultNames.Where(x => x.Type.Contains("User")).ToList();
// Get the users SIDs
List<string> defaultNameSids = defaultNames.Select(x => x.SID).ToList();
// Sneaky sid lookup by the sids
var sneakySids = RPCClient.GetSneakySids(ip, defaultNameSids, signing);
// Remove the names we already have
sneakySids.RemoveAll(x => usernames.Contains(x.Name));
// Rest are missed!
foreach (var item in sneakySids)
{
rpcInfo += "-- " + $"Sneaky Username Found: {item.Name}".Recolor(Color.Orange) + Environment.NewLine;
}
// 23 -> https://room362.com/post/2017/reset-ad-user-password-with-linux/
rpcInfo += "--> rpcclient -> setuserinfo2 userNameHere 23 'newPasswordHere'" + Environment.NewLine;
}
else if (firstItem == "Cannot connect to server. Error was NT_STATUS_RESOURCE_NAME_NOT_FOUND")
{
rpcInfo = "- Cannot connect - Are you sure it's up?" + Environment.NewLine;
}
else if (firstItem == "Cannot connect to server. Error was NT_STATUS_IO_TIMEOUT")
{
rpcInfo = "- Cannot connect - It timed out :<" + Environment.NewLine;
}
else if (firstItem == "Cannot connect to server. Error was NT_STATUS_CONNECTION_DISCONNECTED")
{
rpcInfo = "- Cannot connect - It kicks you out instantly" + Environment.NewLine;
}
else if (firstItem.Contains("was NT_STATUS_ACCESS_DENIED"))
{
rpcInfo = "- enumdomusers is denied - Probably can't get anything useful" + Environment.NewLine;
}
else if (firstItem.Contains("was NT_STATUS_LOGON_FAILURE"))
{
rpcInfo = "- Unable to log on at all - Possibly a timeout :(" + Environment.NewLine;
}
else
{
foreach (string item in enumdomusersList)
{
Console.WriteLine("Debug Info item: " + item);
}
rpcInfo = "- Unknown items in NETBIOS.GetRPCInfo - Bug Reelix (Check Debug Info Item output)" + Environment.NewLine;
}
}
if (anonAccess == true)
{
rpcInfo += "- " + $"Anonymous access permitted! -> rpcclient -U \"\"%\"\" {ip}".Recolor(Color.Orange) + Environment.NewLine;
}
else
{
rpcInfo += "- No anonymous RPC access" + Environment.NewLine;
// 23 -> https://room362.com/post/2017/reset-ad-user-password-with-linux/
rpcInfo += "-- If you get access -> enumdomusers / queryuser usernameHere / setuserinfo2 userNameHere 23 'newPasswordHere'" + Environment.NewLine;
}
}
else
{
rpcInfo = "- Error: Cannot find /usr/bin/rpcclient - Please install smbclient (Includes it)".Recolor(Color.Red) + Environment.NewLine;
}
}
else
{
rpcInfo = "- No RPC Info - Try run on Linux (rpcclient)" + Environment.NewLine;
}
return rpcInfo;
}
}
}